Slide-trombone



E. A. couumER'.

SLIDE TROMBONE.

APPLICATION FILED IUNE 25, 1919.

`Patented July 19, 1921.

.I IIIIII I I 1 'struction' for slide UNITED STATES PATENT oFFvlcE.

ERNST a COUTUBIER, or LAroRTE, INDIANA.

f Application led J'nne 25,

To all lwiom it may concern."

Be it known that l, ERNsrA. Cotrrunmn, a citizen of the United States, and residentl of Laporte, inthe county of Laporte and State of Indiana, have invented certain new and useful Improvements in Slide-Trombones, of which the following is a specifica` tion. f

My invention relates to slide trombones: and has for its primary object an improved construction and arrangement whereby the soundy vibrations emanating `from ythe mouthpiece ofthe instrument pass successively through` parts' each of which has a larger borey than the preceding one. Another object is'to provide animproved'com y .trombones whereby, to the `greatest: extent possible, the bore ofthe instrument is continuously 'and vgradually increased in diameter in the direction of travel of the sound vibrations; in other words, I aim to reduce to a minimum theL length of cylindricaltubing inthe instrument andl to eliminatejanyv reduction oft-he diameterof the bore in t e path of the vibrations from mouthpieceto bell. f A further object lies in the provision of improved guiding means whereby r the novel slide of my invention has its legs kept in perfect axial alinement with those parts of the tubing with which they telescope.

Other objects and advantages of the invention will appear from the following description, taken in conjunction with the acrm a part of companying drawings which fo preferred this specification and illustrate the embodiment of the invention.

In the drawin p n n Figure 1 is a slde elevation of the invention partially sectioned along the ax1s of the tubing and showing the playing slide drawn in.

Fig. 2 is a similar view illustrating an extended position of the slide.

Fig. 3 is an enlarged sectional detall of fragments of the tubing illustrating the guidlng means formaintaining axial alinement of the slide legs and those parts w1th which they telescope. g

Fig. 4 is a fragmentary sectlon on line 4-4 of Figs. 1 and 2. n

Reference numeral 10 indicates any suitable form of mouthpiece the vibrations emanating from which pass `successively into an exteriorly yand interiorly frusto-conical mouthpipe 11,; an interiorly 'cylindrl- SLIDE-TROMBON E.

Specification of Letters `Ilatent.

,Patented July 19, 19.2.1.'k 1919. Serial No. 306,582. y f i c al slide leg 12; a slide bow 13 havingacontinuously and gradually increasing bore; an kexteriorly and interiorly frusto-c'onicalV slide leg 14; an interiorly cylindricalfbellbranch y15; and a bell 17 from `the flared mouth 18 of which `they'emerge.y These parts increase in internal diameter in the order named, this increase being purposely exaggerated'in the drawings.` l v The mouthpipe 11, bell-branch lfand` bell 17 are fixed with respectto each other by means of the customary brackets 19. The slide of the presentinvention comprises the female leg 1 2y which receives telescopically the niouthpipe 11,'the male leg 14"which-5 telescopes within bell-branch 15,11 and thel bow 513, ythis bow carrying the usual vwater key 21. c A hand piece extending toward but not touching the bellbranch 15,`enables the player to manipulate the slide.

It will be noted that the interiorly cylindrical leg 12 of the slide along the exteriorly frusto-conical mouthpipe llfand that the exteriorlyfrusto-conical leg 14 slides within the interiorly cylindrical bell-branch 15. To provide for perfectly smooth movement ofv the slide it is necessary to maintain axial alinement between the mouthpipe 11 and leg 12 and between leg 14 and bell-branch 15. To this end I braze about the outside of each of these exteriorly frusto-conical parts 11 and 14 at the large bore end only thereof a guide collar 23 which is itself exteriorly cylindrical to smoothly fit the cylindrical tube within which it slides and is concentric with that tube. These twolguide collars 23 guide the slide smoothly in its movements, preventing jamming or chattering.

To produce the most desirable tones from an instrument of this character it is essential that, to the Greatest extent mechanically possible, the vibrations produced in the mouthpiece be conveyed to the bell of instrument through a constantly and gradually enlarging pipe. It is a disadvantage of slide trombones now in use that the vibrations, in their travel to the bell, must pass from the second leg of thek slide into a receiver pipe which, being received within 'such second leg, is necessarily of smaller cross-sectional area. The tone of the ordinary type of slide trombone is injured by this constriction of the air passage, but, as described above, the constructlon of the present invention avoids any surrounds and slides such constriction and, hence, results in the production of better tones than heretofore.

I claim:

l. In a trombone, the combination or a cylindrical bell-branch, a mouthpipe or progressively increasing diameter, and a slide comprising a cylindrical leg telescopically surrounding said mouthpipe and slidingly itting the larger end thereof and a leg of progressively increasing diameter telescopically disposed Within and with its larger end slidingly iitting said bell-branch, the bore through said instrument having no portion of more restricted diameter than a preceding portion irrespective of the position' of said slide.

2. In a trombone, the combination ot' a cylindrical bell-branch, a mouthpipe ot' progressively increasing diameter, a slide comprising a cylindrical leg telescopically surrounding said mouthpipe and slidingly fitting the larger'end thereof and a leg otl progressively increasing diameter telescopicallyy disposed within said bell-branch, the

bore through said instrument being devoid ofi'estiictions irrespective of the position ot' said slide, and tapered guide collars sur! rounding said inoutlipipe and the tapered leg ot' said slide, the perimeter-s oi' said collars being cylindrical and adapted to' slid` iiigly tit within tlie'cylindrical leg of said slide and the'cylindrical vbell-branch respectively.

3. In' a trombone, the combination of a eylindrical bell-branch, a mouthpipe oi progressively increasing diameter, a slide comprisin a cylindriealleg telescopieally surrounding said mouthpipe and a leg of progressively increasing diameter slidingly disposed ivitliin said bell branch, said mouthpipe and said last-mentioned leg being ot substantially uniform exterior diameters at their telescoping ends to slidingly tit said lirst-ment-ioned leg and said bell-branch, and collars interiorly tapered and of exterior uniformv diameter mounted upon said mouthpipe and said second-mentioned leg and adapted to respectively slidingly lit within said tirstimentioned leg and said bellbranch.

4. In a trombone, the combination of a cylindrical bell-branch, a moutlipipe et progressively increasing diameter, and a slide comprising acylindrieal leg of uniform interior diameter telescopically engaged with said moutlipipe and a leg o't' progressively increasing diameter telescopic/ally engaged in saidbell branch, the telescopic portion of said bell-branch being oit uniform interior diameter, said mouthpipe being provided ivithan exterior tapered collar oit uniform exterior diameter to slidingly it the cylindrical branch ol" said slide and the tapered leg of said slide being provided with a similar tapered'collar oi' uniform exterior .diarnet-er adapted to slidingly tit the cylindrical bell-"branch,

ERNST A. GOUTURIER. 

